Doorlock



s. D. BuTTERwORT DOORLOGK April 4, 1925.

F led May 28 1923 Patented Apr. 14-, 192.5.

UNITED STATES SAMUEL D. BUTTEREVOR'IH, 0F LANSING, MICHIGAN.

DOORLOCK.

Application filed May 28,

To (ZZZ whom it may concern." 7

Be. it known that SAMUEL D. Bu'r'rn iwonrri, citizen of the United States, residing at Lansing, in the county of Ingham and State of Michigan, has invented certain new and useful Improvements in Doorlocks, of which the following is a specification.

This invention relates to door locks and more particularly to that class of locks pro-- vided with roll striker.

One diiliculty with the roll striker locks has been that the door may be pushed open when an excessive force is applied to the door. When the carpenter installs a look within the door, he mortises out a hole in which the lock casing is" adapted to fit. As a general rule, he makes his hole of a greater depth than is necessary and, therefore, the back of the casing does not bear on a solid support. so as to lock the roll within the striker plate, it will, under ordinary conditions, lock the door, but if one puts his shoulder to the door and exerts an extraordinary force against the same, he will force the roller out of the striker plate by causing the face plate of the lock casing to bend inwardly since there is no solid support behind the casing to prevent this inward distortion under the extraordinary forces exerted by wedging the roller against the inclined wall of the keeper plate.

One of the objects of this invention is to overcome this diiiiculty by providing a deadlocking bolt which has two functions; to wit, the deadlocking of the door and the'dogging of the roll striker. By utilizing the deadlocking bolt in this manner, I convert the entire breadth of the latching means, which includes the roll striker and bolt into a deadlocking bolt. The addition of the deadlocking bolt relieves the chance of any force being exerted on the roll striker, which eliminates any chance of the force exerted on the door causing the roller to ride out of the recess in the striker plate and produce a wedging action, causing the face plate of the casing to become distorted.

In the drawings: 7

Fig. 1 is an elevation of the lock with the casing cover removed, showing the bolt projected.

Fig. 2 is a similar view showing the bolt retracted.

Fig. 1.

When the roll striker is dogged 1923. Serial No. 641,831.

A door a is provided with the usual mortised hole Z) in which a lock casing c is adapted to be fitted. The lock casing is provided with the usual face plate (Z, which is secured by screws to the door in the usual manner.

Slidable within the lock casing is a pair of separate rollbearing members 6, yieldably forced outwardly by the spring f; A pin 9 is carried by the roll-bearing, members, and intermediate of the bearing members are a pair of rubber rolls h, which are rotatably mounted on said pin. These rolls are of such a length as to leave a. space inbetween. A bolt 2". is slidably supported within the casing and is adapted to project in the space left between the rolls. The outer end of the bolt is provided with a. slot j which is adapted to span the pin 9 when the bolt is projected out of the casing,

the bolt engaging the pin for the purpose of dogging thc'rolls. The opposite end of the bolt is provided with a V notch 70, the side walls of which are adapted to be engaged by the key Z whereby the bolt may be moved to a locked or unlocked position. The back of the bolt is provided with 9. lug m, which is adapted to be engaged by a downturned ear or of the tumbler 0. This tumbler is provided with a leaf spring p which bears against a support carried by the casing, gvhich forces the said tumbler against the olt.

As shown in Fig. 1, the downturned ear 0% is engaged behind the lug m. In Fig. 2, the bolt has been retracted and the ear of the tumbler is located in front of the lug m, which will hold the same in a retracted position. lVhen the key is turned in the lock, the striking edge of the key designatedm will first engage the edge a: of the tumbler to dis-engage the ear n from the lug m and further movement of the key will engage the side Wall of the V notch 70 in the bolt to actuate the same, and the tumbler is allowed to spring back, so as to engage the other side of the lug m when the key isremoved to hold the bolt.

A striker plate .9 is provided with a recess L, the central portion of this recess adapted to receive the deadlocking bolt while the adjacent portions of the recess have inclined walls a on which the rolls ride upon the opening of the door. In ordinary roll locks when the roll is dogged, an excessive force applied to the door will force the roll against the incline and wedge the same. This wedging action will force the roll inwardly against the resistance of its dogging means, and the construction of thecasing is such that it is not strong enough towitl stand the forces, but will buckle and give away under the strain. 7

Obviously when the bolt is projected from the casing it is held in this projected position by the tumbler 0 and the door is securely same outwardly, a striker plate provided with a recess having inclined walls for the roll to ride upon, and a deadlocking bolt slidably supported within the casing intermediate the ends of the roll striker, the said bolt arranged to straddle the roll to also dog the same.

35 2. A door lock, having in combination, a

casing, a two-part roll striker slidably supported therein, the said parts spaced from each other, means for yieldingly forcing the same outwardly, a striker plate provided with a recess having inclined walls for the rolls to ride upon, and a deadlooking'bolt slidably supported within the said casing and adapted to slide between said rolls and provided with means for straddling the said two-part roll striker-to also dog the same.

A door lock, having in combination, a casing, a roll striker comprising a pair of rolls and a pin for supporting the rolls, said rolls spaced from each other, a striker plate 'Jrovided with a recess lIELVlD inclined walls r for the rolls to ride upon, and a deadlocking bolt slidably supported within said casing provided with a slot in the end thereof,

said bolt adapted to engage with the pin supporting the rolls when the same is projected out from the casing for the purpose of dogging the rolls.

4. A door lock, having in combination, a casing, a roll striker comprising a pair of spaced rolls and a pin for supporting the rolls, means for yieldingly forcing the same outwardly, a striker plate provided with a recess having inclined walls for the rolls to ride upon, and a dead locking bolt slidably supported within said casing and arranged to engage with the pin for the purpose dogging the rolls.

' In testimony whereof he has affixed his signature.

SAMUEL n. BUTTERWORTH. 

